with 1 the default value for radius, halfheight and height,
and the origin the default for center, and the
arc running through all the angles from alpha to beta (default
is [-pi/2,pi/2]), and the cone, cylinder, and torus
centered at the origin with their major circle in the (x,y)-plane,
and the minor circle of the torus having radius radius*ratio,
the default for ratio being 1/3.

From these, one may generate related shapes by affine transformations,
with the help of fncmb(rs,transformation).